﻿#region Copyright

// // The contents of this file are subject to the Mozilla Public License
// // Version 1.1 (the "License"); you may not use this file except in compliance
// // with the License. You may obtain a copy of the License at
// //   
// // http://www.mozilla.org/MPL/
// //   
// // Software distributed under the License is distributed on an "AS IS"
// // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
// // License for the specific language governing rights and limitations under 
// // the License.
// //   
// // The Initial Developer of the Original Code is Robert Smyth.
// // Portions created by Robert Smyth are Copyright (C) 2008-2013.
// //   
// // All Rights Reserved.

#endregion

using System;
using NoeticTools.NWorkflow.Exceptions;
using NoeticTools.NWorkflow.Steps;


namespace NoeticTools.NWorkflow.ProgressMonitoring
{
    internal class StepProgressScope : IProgressScope
    {
        private readonly IStepRules _stepRules;

        public StepProgressScope(IStepRules stepRules)
        {
            _stepRules = stepRules;
        }

        void IDisposable.Dispose()
        {
            throw new WorkflowProgressConfigurationException();
        }

        public IProgressScope Parent { get; private set; }

        public double TotalCompleted
        {
            get
            {
                var progress = ((IStep)_stepRules).Progress;
                return (double.IsNaN(progress.Completed) || (progress.Total < double.Epsilon)) ? 0.0 :  progress.Completed*progress.Total;
            }
        }

        public void Enter(IProgressScope childScope)
        {
            throw new WorkflowProgressConfigurationException();
        }

        public void AddStep(IStepRules stepRules)
        {
            throw new WorkflowProgressConfigurationException();
        }

        public double UpdateWeights(double startingWeight)
        {
            return _stepRules.StepRuleProgress.UpdateWeights(startingWeight);
        }

        public string Name
        {
            get { return _stepRules.StepRulesName; }
        }
    }
}